22 Bor the following report about a statistical study, identify the following it

Question

22 Bor the following report about a statistical study, identify the following items (if possible).If you can't tell, then Shoppers at a local supermarket where asked to volunteer to participate in a survey. The survey purpose was to ascertain the proportion of Australians consuming multivitamins of any kind on a daily basis so - this often happens when we read about a survey. a) The population b) The population parameter of interest c) The sampling frame d) The sample The sampling method, including whether or not randomisation was employed Who (if anyone) was left out of the study Any potential sources of bias you can detect and any problems you see in generalising to the population of interest e) f) g) 0.5+0.5+0.5+0.5+0.5+0.5+1-4 marks]

Explanation / Answer

a) population: A group of all individuals or unit defined according to the aims and objectives of the survey.

here Australian who consuming multivitamins of any kind on a daily basis is population.

b) The population parameter of interest:  the proportion of Australian consuming multivitamins of any kind on a daily basis.

c) The sampling frame: For the purpose of selecting a sample it is necessary that the population to be sampled can be subdivided into a finite no. of distinct and indefinable units called sampling units, the listing of all the distinct and indefinable units is called the sampling frame.

d) Sample: A representative part of the population.

shoppers at the local market are the sample.

e) we can use the randomization method, but for better result well prefer stratified sampling.

f) the population of a fixed age will out of the study.

g) for detecting bias we should choose sample a right way. and a researcher also makes a model for detecting bias in sampling.

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